Now available from Tronixlabs Australia is this useful Raspberry Pi AVR Programmer HAT from SparkFun. Originally designed by SparkFun for inhouse use, it is perfect for uploading code to AVR boards in bulk or just easily one-off.

The HAT works perfectly with AVRdude on the Pi - and contains LED status indicators, a touch pad to start the process, and the lead shown above with the small breakout board to connect directly to ICSP pins on the target board.